흉부외과 또는 일반외과 의사 목록 출력하기

https://school.programmers.co.kr/learn/courses/30/lessons/132203

• 문제 풀이

SELECT DR_NAME,
       DR_ID,
       MCDP_CD,
       TO_CHAR(HIRE_YMD, 'YYYY-MM-DD') AS "HIRE_YMD"
FROM DOCTOR
WHERE MCDP_CD IN ('CS', 'GS')
ORDER BY HIRE_YMD DESC, DR_NAME ASC;

SELECT DR_NAME, 
       DR_ID, 
       MCDP_CD, 
       TO_CHAR(HIRE_YMD, 'YYYY-MM-DD') AS "HIRE_YMD"
FROM DOCTOR
WHERE MCDP_CD = 'CS' OR MCDP_CD = 'GS'
ORDER BY HIRE_YMD DESC, DR_NAME ASC;

• 실행 결과